It'd be nice to have physical photos though, especially to have guests put together in a guestbook. The Photojojo store is now carrying the Fuji Instax Wide Format Instant Camera which could work really well as a Polaroid substitute. It's a bit expensive for more or less a toy, $80 for the camera and $22 for film (20 exposures), but perhaps I can wrangle it as a birthday/Christmas gift of some kind. Though, I think I'm going on a cruise in the Caribbean with my parents for my birthday and I'd really like a new digital camera for that occasion (thinking of the Canon S90 right now, just based on not martha's recommendation).
I've posted before about the chalkboard message board that could go in the photo booth as a prop. They are now also carrying these photo paddles to add whimsy.
Can be held up by subjects or photographer for changes in scale.
On a more serious idea, I love, love the group panorama shots by A Beautiful Day Photography in Seattle (aka Conan O'Brien's wedding photographer), a new sponsor to A Practical Wedding.
I sent Kelly an email yesterday about this, I hope it's not offensive to ask about something that another photographer does. The thing is I think most of the wedding photos will just stay in an album or book and only be hauled out occasionally, but with a big group shot like this, I wouldn't feel self-conscious displaying it prominently on a wall.
Last quick thing: Miss C wrote a post about whether hiring a videographer would be worth it and the comments on the post all support asking a family friend to capture important moments in the ceremony and throughout the day to have a low-key video that could then be edited together. I like this idea, I think I'll ask someone(s) to be the Flip cam person and then also ask for help getting a video edited together. I have plenty of clips on my computer that I'm overwhelmed by trying to put together.